Patent US3397621A successfully refreshed from Google Patents.
US3397621A
Expired / Lapsed
US
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Vacuum modulator
Assignee: Motors Liquidation Co
•
Filing: 1965-10-14
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Granted: 1968-08-20
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Ronald C Groves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:49
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/14; F16H59/26; F16H59/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899948A
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US862867A
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US2654995A
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US2672890A
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US2902048A
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US2936785A
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US3049931A
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US3106104A
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US3128751A
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US3295388A
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US3302534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |